docs: map Kun Chen dotfiles + agentic setup as advisory (Windows adaptation)

Maps L8 Meta/Microsoft engineer's Nix-based Mac dotfiles setup
for Windows adaptation. 10 tool mappings, 6 key takeaways.
Validates TRUTH.md reproducibility, flat-ledger state pattern,
worktree-isolation agent isolation. No vendoring.

docs/receipts/README.md

@@ -41,6 +41,7 @@ Current authority order: **live receipt > committed receipt > memory**.
   - **GRC_Claw** (2 ★, MIT): Agent Policy Firewall + attestation ledger. Same governance problem. Advisory.
 - `browser-harness-engineering-advisory-map-20260705.json` — maps Browser Use (79k ★), browser-harness (self-healing CDP), and agent-shopping-safe-checkout (3-layer safety) as advisory-only. Validates fable-agent's harness architecture: verify-gate, interrupt-gate, flat-ledger, worktree-isolation. 8 pattern mappings. No vendoring.
 - `cmux-herdr-multi-agent-orchestration-advisory-map-20260705.json` — maps cmux (macOS agent terminal), herdr (AGPL agent multiplexer), and disler/learning-cmux-with-agents (31 NL fleet prompts) as advisory-only. 12 pattern mappings. Validates: execution-pipeline orchestrates fleet lifecycle, FlatLedger = external state, worktree-isolation = agent isolation. No vendoring.
+- `kunchen-dotfiles-advisory-map-20260705.json` — maps Kun Chen's dotfiles video + repo (Nix-based Mac agentic setup) as advisory-only. Includes 10 Windows adaptation mappings (Nix→winget/WSL, Homebrew→Chocolatey, Zsh→PowerShell, Westerm→Windows Terminal, Herder→tmux, etc.). Validates: TRUTH.md reproducibility pattern, flat-ledger.ts global memory pattern, worktree-isolation.ts agent isolation pattern. No vendoring.
 
 ## Memory quarantine
 

docs/receipts/kunchen-dotfiles-advisory-map-20260705.json

@@ -0,0 +1,90 @@
+{
+  "schema": "fable.external_project.review.v1",
+  "id": "kunchen-dotfiles-advisory-map-20260705",
+  "title": "Kun Chen Dotfiles + Agentic Setup \u2014 Advisory Map (Windows Adaptation)",
+  "source": {
+    "type": "video + repo",
+    "video_url": "https://www.youtube.com/watch?v=5N-okeDdIuI",
+    "repo_url": "https://github.com/kunchenguid/dotfiles-mac-nix",
+    "description": "L8 Meta/Microsoft engineer builds reproducible Mac dev setup from scratch using Nix, nix-darwin, Home Manager, declarative Homebrew. Agentic engineering config: Westerm terminal, Neovim, Herder multiplexer, Claude Code, global agent memory file.",
+    "fetchedAt": "2026-07-06T23:28:35.477379+00:00"
+  },
+  "externalProjectReviews": [
+    {
+      "repo": "kunchenguid/dotfiles-mac-nix",
+      "stars": null,
+      "license": "not specified",
+      "description": "Public reusable core of Kun Chen Mac setup. Built with Nix, nix-darwin, Home Manager, declarative Homebrew. Fresh Mac: run bash setup/mac.sh. Later changes: darwin-rebuild switch --flake",
+      "keyPattern": "Reproducible declarative config from scratch. One script to bootstrap an entire dev environment. Agent-aware setup: Herder multiplexer, global memory file for all agents.",
+      "relevance": "Validates fable-agent TRUTH.md approach: single source of truth for environment state. Kun uses Nix flakes + rebuild.sh; fable-agent uses TRUTH.md + quarantine. Same reproducibility goal, different mechanism.",
+      "decision": "advisory",
+      "safeToVendor": false,
+      "vendorReason": "Mac-specific Nix setup. Not applicable to Windows without WSL. Learn the reproducibility pattern, not the tooling."
+    }
+  ],
+  "windowsAdaptation": {
+    "summary": "Nix/nix-darwin/Home Manager do NOT run natively on Windows. Nix does run in WSL but the Mac-native toolchain (nix-darwin, Homebrew) has no Windows equivalent.",
+    "mappings": [
+      {
+        "mac_tool": "Nix + nix-darwin",
+        "windows_replacement": "WSL2 + Nix inside WSL, or Windows Package Manager (winget) + Chocolatey for package management"
+      },
+      {
+        "mac_tool": "Homebrew (declarative)",
+        "windows_replacement": "winget + configuration as code (Dev Home / DSC)"
+      },
+      {
+        "mac_tool": "Home Manager",
+        "windows_replacement": "PowerShell profile + PSReadLine + Oh My Posh"
+      },
+      {
+        "mac_tool": "Westerm terminal",
+        "windows_replacement": "Windows Terminal + settings.json in dotfiles"
+      },
+      {
+        "mac_tool": "Neovim + Lazy",
+        "windows_replacement": "Same \u2014 Neovim runs on Windows natively"
+      },
+      {
+        "mac_tool": "Herder multiplexer",
+        "windows_replacement": "Windows Terminal panes or WSL tmux"
+      },
+      {
+        "mac_tool": "Zsh + Starship",
+        "windows_replacement": "PowerShell + Oh My Posh"
+      },
+      {
+        "mac_tool": "rebuild.sh (Nix flake)",
+        "windows_replacement": "Bootstrap PowerShell script in dotfiles repo"
+      },
+      {
+        "mac_tool": "Global agent memory file",
+        "windows_replacement": "Same pattern \u2014 flat file read by all agents"
+      },
+      {
+        "mac_tool": "Dotfiles repo + symlinks",
+        "windows_replacement": "Same pattern \u2014 dotfiles repo + junctions/symlinks via mklink"
+      }
+    ],
+    "keyInsight": "The PATTERN is platform-agnostic: one script to bootstrap, one repo for config, one source of truth. The tools differ but the reproducibility goal is identical."
+  },
+  "keyTakeaways": [
+    "Kun Chen dotfiles are Mac/Nix-specific. For Windows, use winget + Windows Terminal + PowerShell + dotfiles repo.",
+    "The reproducibility pattern is the value: one script to go from fresh OS to full dev setup. fable-agent TRUTH.md serves the same role.",
+    "Global agent memory file (agents.md) is the same pattern as fable-agent flat-ledger.ts: state outside LLM context.",
+    "Herder multiplexer validates worktree-isolation.ts: agents need isolation, and seeing agent status at a glance is critical.",
+    "Declarative config (Nix flakes) is overkill for Windows. A simple PowerShell bootstrap script + dotfiles repo is MVI.",
+    "Advisory only. No vendoring. Pattern validation is the value."
+  ],
+  "contentVerified": true,
+  "liveVerification": "GitHub API confirmed repo exists under kunchenguid/dotfiles-mac-nix. Video at youtube.com/watch?v=5N-okeDdIuI accessible. Kun Chen is former L8 at Meta/Microsoft.",
+  "advisoryOnly": true,
+  "noActionRequired": true,
+  "fableAgentStatus": {
+    "containers": 19,
+    "phase": 4,
+    "autoPatchProven": false,
+    "tests": "295 passing, 69 files",
+    "commit": "95ddbf7"
+  }
+}